Question

Why is the sky blue?

Answer 1

sky is blue because water present on the surface of the earth reflect sunlight which get scatter and the sky seem to be blue in colour dur to short wave lenght.

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Answer 2

A clear cloudless day-time sky is bluebecause molecules in the air scatterblue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the bluelight has been scattered out and away from the line of sight.